Measurements are as follows:
Diameter including spurs - 26.6mm
Diameter not including spurs - 25.3mm
Diameter of inside lip - 24mm
Diameter of center shaft - 7.87mm
Diameter of center bore hole - 2.9mm
Height at max - 4.72mm
Height at min - 3.16mm
Inside lip of gear - 1.52mm
Length of spur - 0.7mm